Software Design and Development Flashcards
Analysis
production of a software specification that will outline what the software must do.
Design
plan the design of the program, and the user interface
implementation
write the code for the program/software
Testing
fully test the program to ensure that all aspects work correctly
Documentation
technical guide- how to install software - and user guide software
Evaluation
is the program fit for purpose and robust
ADITDE
the software development program
ADITDE is an iterative process? What does this mean?
An iterative process is one where each stage may have to be revisited as a result of new information coming to live
Input -
data that is entered into the program
Processes -
what the program does with the inputted data
Output
data that is outputted to the user
Inputs, processes and outputs are what part of the software process
analysis
What is Psuedocode?
Psuedocode is structured English for describing a program read by a human
Structure Diagram
breaks the problems down into smaller sections
Flowchart
shows what is going on in a program and how data flows around it
String
stores text and alphanumeric combinations
Character
stores a single character which can be a letter, number or symbol
integer
stores positive and negative whole numbers
real/float
stores numbers with decimal places, can also store integers
boolean
stores TRUE or FALSE only
arrays
stores a list of related data (starts at index 0)
What are variables?
Variables are locations in memory where programs store and retrieve information
ARITHMETIC OPERATIONS
addition, subtraction, multiplication, division, exponentiation
Concatenate
the processes of joining two or more strings to make a new text string.
Selection
The program selects an action dependant upon the value of variables.
Selection statements
If, Then
If, Then, ELse
If, Then, ELse if
<
less than
>
more than
<=
Less than or equal to
> =
More than or equal to
==
Equality
!=
Not equal to
Complex Conditions
AND - both conditions must be true
OR - either conditions must be tru
NOT
the condition shouldn’t be true
What is iteration?
Iteration is the process where program repeat a group of instruction
Fixed Loop
when a group of instructions is repeated a pre-determined number of times.
Conditional LOOP
will keep repeating a group of instructions until a specific conditional is met.
Predefined functions (with parameters)
A pre-defined function is a segment of code that can be referred to and it will do something useful.
what is the purpose of testing?
to detect and remove errors in a program
Normal Data
data that you would expect to work or be accepted (value within the range)
Extreme Data
data at the lower and upper limits of what is expected. (lowest/highest value)
Exceptional Data
data that should not be accepted by the program (value outside of the range.
Test Table
provide a structure to testing, and evidence that testing has taken place
How many types of errors can a program have?
3
Syntax Error
This is an error in the spelling or grammar used when coding
Execution error
This type of error occurs when the program is asked to do something that it cannot do, resulting in a crash
Logic error
This is an error in the logic of the code. Program will run but provide unexpected results.
internal commentary
add descriptions, notes and explanation to the code
meaningful identifiers
use variable names that describe what the variable contains
indentation
makes it easier to identify constructs. Mandatory in Python.
white space
helps make the steps of the program clearer.
